Luo Ben (c. 1330–1400, or c.1280–1360), better known by his courtesy name Guanzhong (Mandarin pronunciation: [lwo kwanʈʂʊŋ]), was a Chinese writer who lived during the Yuan and Ming periods. He was also known by his pseudonym Huhai Sanren (Chinese: 湖海散人; pinyin: Húhǎi Sǎnrén; literally: "Leisure Man of Lakes and Seas"). Luo was attributed with writing Romance of the Three Kingdoms and editing Water Margin, the first two of the Four Great Classical Novels of Chinese literature.